[PREFACE TO SECOND EDITION.]
In issuing a second edition of the Dry Collodion process, I would take occasion to remark, that after some months' practical working, it has not been found necessary to make any material alteration in the process; success has usually attended the adoption of it, and in those cases where good pictures have not resulted, the failure has always been traced to the use of a Collodion not suited to the process.
I cannot allow this opportunity to pass, without thanking those gentlemen whose opinions possess weight in matters photographic, for the very candid manner in which they have tested the capabilities of my process, and for the very flattering testimony they have borne to its efficiency, simplicity, and certainty.
CHARLES A. LONG.
153, Fleet Street,
September 1857.
[PREFACE TO THIRD EDITION.]
The process described in the following pages has now been in use for twelve months, and I have much satisfaction in stating that it has, in almost every instance where it has been adopted and carried out with care and attention, yielded results which leave scarcely anything to be desired.
The present Edition might more properly be termed a reprint, as the alterations in the text do not extend to more than a few matters of detail, which experience has shewn to be desirable, the principles of the process remaining undisturbed.